Speaking to a sharply divided Republican state convention, Maine's Olympia Snowe called for GOP gains in the upcoming elections as she presented her final speech to the gathering as a U.S. Senator.

Snowe recounted her achievements over three decades representing Maine in Congress, as she spoke for a half hour to the delegates at the state convention in Augusta. She was greeted with and closed to standing ovations, and delegates held up signs saying "Thank you Olympia."

Snowe shocked Maine's political establishment when she announced in February she would not seek re-election, citing an increasingly polarized political climate of Washington.

But she made no reference Sunday to that frustration but instead trained her criticism on President Barack Obama and called for his ouster.